User:Tilman Schirmer/Sandbox 60

Bacterial potassium channel


KcsA bacterial potassium channel in complex with monoclonal Fab fragments 1k4c.

View down the channel axis on the molecular 4-fold symmetry axis with modeled K+ ions in magenta.

The ions are coordinated by main-chain carbonyl groups (only one subunit shown).

The ion in the hydrophobic cavity is coordinated by 8 water molecules.